Oil cooling system



Aug. 16, 1938. J. TOTH. JR

OIL COOLING SYSTEM Filed Jan. 14, 1937 2 Sheets-Sheet 1 B K E M J 2 W I 0 Q j T W m w 1% .n E W mm r m W M ANN \Q R Qfi m wr a. .W\ L

Aug. 16, 1938. J. TOTH, JR

OIL COOLING SYSTEM Filed Jan. 14, 1937 2 Sheets-Sheet 2 Jakn. DiZlfi Patented Aug. 16, 1938 UNITED STATES PATENT OFFICE This invention relates to a mechanism or system for cooling the lubricating all employed in crankcases or the equivalent, in connection with all types of internal combustion engines, and

Diesel engines, and whether stationary or mobile.

It is particularly aimed to provide a construction adapted to be mounted on the cylinder block or equivalent of the engine. at the coolest location and to be operated through the motion of the engine.

A further object is to provide a novel structure of a unitary nature, wherein the oil is elevated by a gear pump and permitted to descend through a radiator, cooled by an air circulating mechanism operated by the unit.

It is also aimed to provide a novel means for packing the operating shaft for the gear pump to prevent danger of leakage.

20 Another object is to provide a novel structure wherein the radiator has a tank at the upper end thereof into which the oil is discharged for cooling, and which tank is normally out of communication with the atmosphere but adapted to be 25 placed in-communication therewith through the medium of a valve controlled by a float in said tank or chamber.

The more specific objects and advantages will become apparent from a consideration of the de- 30 scription following taken in connection with accompanying drawings illustrating an operative embodiment.

In said drawings:-

Figure 1 is a view in side elevation of an engine 35 equipped with my improvements;

Figure 2 is a rear elevation, partly in section, of my improvements;

Figure 3 is a detail section taken on the line 3-3 of Figure 2, and

40 Figure 4 is a detail section taken on the line 4-4 of Figure 1.

Referring specifically to the drawings wherein like reference characters designate like or similar parts, the engine illustrated in Figures 1 and 4 at 45 III is to be taken as diagrammatic, it specifically being an automobile propelling engine. It may however be any type of internal combustion engine, a Diesel engine and be either stationary or mobile.

. 50 My improvements embody a shell ll adapted to be attached, preferably at the side of and to the engine ll as by bracket means at II, at the coolest location. Within the shell II is a radiator l3 whose spaces or passages communicate 65 with a tank or header l4 at the upper end thereof and with a tank or header II at the lower end thereof.

Rearwardiy of the shell and radiator and supported by bracket or brace arms it connected thereto, is a casing ll, of any specific structure, 5 preferably separable. of a gear pump. Such pump having internal rotors l8 and I9 coacting to pump oil through the casing. This casing has a main section and a detachable section or plate 2| secured thereto by bolts 22. Rotor i8 is 1 carried by a stub shaft 23 while the rotor l8, which drives the rotor I8, is keyed to a driving shaft 24 having a shoulder at 25 in thrust engagement with the plate 2|.

Extending from the section 20 is an integral 15 tubular projection 26 in which flexible packing is disposed at 21 about the shaft 24 and the in- ;Lined portion 28 of the tube adjacent the section A follower 29 is slidably disposed within the 20 sleeve 26, having an angular face at 30 in contact with said packing and the follower is constantly urged into engagement with the packing to take up wear and maintain it compressed through the agency of a coil spring 31. The 25 spring is engaged by a nut 32, in which the shaft 24 is also journaied, and which nut has adjustable screw threaded engagement at 33 with the interior of the cup 26.

Said gear pump is adapted to draw oil from the 30 crankcase l0 through a pipe 34 and suitable fitting 35 connected to the shell and from the same through a pipe 36 into the casing I1 and discharge the same through a pipe 31 leading from the casing to the header l4. The oil from the 35 header I4 is adapted to trickle or circulate through the various minute passages of the radiator I 3, collecting in the header i5. From the header It, the oil completes its circulation or return through a fitting 38 connected to the shell and a pipe or conduit 39 in communication with the crankcase or location from whence the oil was removed. It will be noted that the fittings 35 and 38 include check valves 40 and 4i respectively, opening in opposite directions and urged into contact with seats 42 and 43, respectively, by expansive coil springs 44 and 45, respectively.

In the header l4 a needle valve 45 is mounted in a fitting 46, and normally engaged with a seat 41 thereof cutting off communication with the atmosphere. The valve is urged downwardly orto open position by an expansive coil spring 48 surrounding the same and such movement is limited through the coaction of a pin 49 in a slot iii of the fitting. A float Ii engages the oil in the as header H, having an arm 52 pivoted at 53 to a bracket or support 54 within the header the arm 52 having an extension 55, engageable with the lower end of the valve by means of a cup 56 carried by the arm or extension 55.

The shaft 24 is extended forwardly of the casing l1 and between the casing and the radiator l3, has a fan 55 fastened thereon. This fan draws air from front to rear through the various air passages of the radiator l3 serving to cool the walls of the oil passages and the oil therein, so that when the oil returns to the header l5 it will be in a cool condition and in that condition transferred through the pipe 39 back to the crankcase or the equivalent.

Said shaft 24 may be operated in any suitable manner as through the medium of a flexible shaft 56 having screw connections as at 51 at one end, to the shaft 24, the flexible shaft passing through an end cap 58 fastened to a supplemental sleeve 59, by screw threads at 50, the supplemental sleeve being connected to the sleeve 25. Said flexible shaft 56 may be driven in any suitable manner and for instance may have a pulley 5| keyed thereto and engaged with a belt 62, which may be the fan belt driven by the engine 10 in the conventional. way, to operate an air circulating fan 63 for the water cooling system of the engine and specifically the radiator 64 thereof. The pulley 6| may have a short shaft 65, journaled as at 56 to a bracket fastened to or in any suitable manner provided on the engine.

When the engine is started, the air release valve 41 is opened, permitting escape of all air pressure in the header l4 and enabling the oil to fill the radiator as it is pumped up into it by the gear pump, through the conduit 34, fitting 35, conduit 36, the oil pump and the conduit 31. After such radiator is filled, the air release valve 45 will be closed through the raising of the float 5| and associated mechanism and the pressure of the oil opens check valve 4|, forcing the oil or permitting the oil to flow back into the crankcase through the fitting 38 and pipe 39, giving a complete circulation of oil, with cooling thereof through the action of the fan 55 incidental to passage of the oil through the radiator I3. When the motor is stopped, the check valves 40 and 4| close the oil lines or pipes to keep the oil from running back into the crankcase.

Because of the provision of the flexible shaft 56 it is apparent that the bracket l2 supporting shell I I may be located, as shown in the drawings, on the engine III or any other position, as "for instance on the base frame of the engine, in the coolest location available.

I claim as my invention:

A cooling mechanism of the class described having a radiator provided with upper and lower headers in communication with the passages thereof, a pump, having a shaft, means supporting the pump in unitary relation with the radiator, conduit means of communication between the pump and the upper header, conduit means through which the pump may elevate oil through the pumpto the conduit means first-mentioned, a fan operable by the said shaft located between the pump and the radiator, a return pipe means for oil leading from the lower header, oppositely movable check valves disposed in the last two mentioned means, a valve in said upper header adapted to cut-off communication with the atmosphere, means urging the valve to open position, and float controlled means in said header operable to close the last mentioned valve.

JOHN TOTH, JR. 

